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Finding the Fourth Proportional to 71,687.17, 107,508.90 and 19,089.82

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Solution

The fourth proportional to 71,687.17, 107,508.90 and 19,089.82 is: 28,628.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,687.17 : 107,508.90 = 19,089.82 : x
  2. Step 2: Convert to fraction form
    71,687.17/107,508.90 = 19,089.82/x
  3. Step 3: Cross multiply
    71,687.17x = 107,508.90 × 19,089.82
  4. Step 4: Simplify right side
    71,687.17x = 2,052,325,549.40
  5. Step 5: Solve for x
    x = 2,052,325,549.40/71,687.17
  6. Step 6: Final answer
    x = 28,628.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.